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{"title":"Compact 1000-30000m3\/h Rotary Heat Recovery Ventilator with Electric Heater and Modular Design","imgUrl":"https:\/\/img.chinax.com\/nimg\/2b\/50\/8203fbdaf69619fc8af17214b3e5-200x200-1\/compact_1000_30000m3_2fh_rotary_heat_recovery_ventilator_with_electric_heater_and_modular_design.jpg","attrs":{"Pressuredrop":"50 - 150 Pa","Noiselevel":"Below 65 dB(A)","Airflowcapacity":"500 - 5000 CFM","Motortype":"EC Motor \/ AC Motor"}}
{"title":"Ceiling Mounted Energy Recovery Air Purification Ventilation System with Heat Recovery","imgUrl":"https:\/\/img.chinax.com\/nimg\/80\/e1\/d16205d27e3d73f5459df8b8bdb1-200x200-1\/ceiling_mounted_energy_recovery_air_purification_ventilation_system_with_heat_recovery.jpg","attrs":{"Material":"Galvanized Steel","Feature":"Flexible, Energy Saving, Easy Install","Installation":"Ceiling Mounted","Shape":"Rectangle"}}
{"title":"2025 Newest HVAC System Greenhouse air Conditioning System Passive House Crossflow Vmc Heat Recovery","imgUrl":"https:\/\/img.chinax.com\/nimg\/0d\/db\/90c16512275827756a9c0a3d2e89-200x200-1\/2025_newest_hvac_system_greenhouse_air_conditioning_system_passive_house_crossflow_vmc_heat_recovery.jpg","attrs":{"Feature":"Flexible","Warranty":"1 Year","After-sale Service":"Online Technical Support, Free Spare Parts, Return and Replacement","Project Solution Capability":"total solution for projects, graphic design"}}
{"title":"Positive Inpu Fresh air Unit Room Ventilation Fans Positive Pressure Tube Ventilation System","imgUrl":"https:\/\/img.chinax.com\/nimg\/d3\/d4\/d0154d74e23c714e656da6199a59-200x200-1\/positive_inpu_fresh_air_unit_room_ventilation_fans_positive_pressure_tube_ventilation_system.jpg","attrs":{"Feature":"Flexible","Warranty":"1 Year","After-sale Service":"Online Technical Support","Project Solution Capability":"Others"}}
{"title":"Vav Unit Terminal Single Duct HVAC Vav Boxes Hvac Cav Box Variable air Volume Unit Vav Box","imgUrl":"https:\/\/img.chinax.com\/nimg\/af\/51\/484f959601778dbfb242dbd9b5ff-200x200-1\/vav_unit_terminal_single_duct_hvac_vav_boxes_hvac_cav_box_variable_air_volume_unit_vav_box.jpg","attrs":{"Material":"Stainless Steel, Galvanized Steel, Galvanized Steel","Feature":"Flexible, Easy Install, Installation","Installation":"Ceiling Mounted","Shape":"Rectangle, Round"}}
{"title":"Metal Pressurized Fresh air Duct Pipe Fan Ventilation Unit Ducted Ventilation System","imgUrl":"https:\/\/img.chinax.com\/nimg\/5c\/5e\/63110c30432de9d4c1f50a2295d7-200x200-1\/metal_pressurized_fresh_air_duct_pipe_fan_ventilation_unit_ducted_ventilation_system.jpg","attrs":{"Material":"Stainless Steel, Galvanized Steel, Metal","Feature":"Flexible, Easy Install","Installation":"Ceiling Mounted, Ceilling","Shape":"Rectangle"}}
{"title":"Quite Cabinet-type Duct Centrifugal Fan Ventilator Purification Fresh air Ventilation","imgUrl":"https:\/\/img.chinax.com\/nimg\/ab\/21\/0b8d16034b541d36c839081116b4-200x200-1\/quite_cabinet_type_duct_centrifugal_fan_ventilator_purification_fresh_air_ventilation.jpg","attrs":{"Material":"Stainless Steel, Galvanized Steel","Feature":"Flexible, Easy Install","Installation":"Ceiling Mounted, Ceiling mounted ductwork","Shape":"Rectangle"}}
{"title":"Industrial Centrifugal Separator air Cleaner Oil Mist Coolant Collector Filter for Cnc Machine Tools","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/db\/92e41a857d089296bb15ed48c4a7-200x200-1\/industrial_centrifugal_separator_air_cleaner_oil_mist_coolant_collector_filter_for_cnc_machine_tools.jpg","attrs":{"Type":"oil mist collector","Brand Name":"DINGHAN","Place of Origin":"Hunan, China","Application":"Industrial"}}
{"title":"2500CMH Industrial Oil Mist Collector with ESP Filter for CNC Machine Fine Filtration","imgUrl":"https:\/\/img.chinax.com\/nimg\/4c\/3c\/05b62a1600bb6af6dcba85833b74-200x200-1\/2500cmh_industrial_oil_mist_collector_with_esp_filter_for_cnc_machine_fine_filtration.jpg","attrs":{"video outgoing-inspection":"Provided","machinery test report":"Provided","core components":"Motor","Place of Origin":"Hunan, China"}}
{"title":"Electrostatic CNC Oil Mist Collector with Motor 99% Purify Efficiency ESP Extractor for Industry Smoke Elimination","imgUrl":"https:\/\/img.chinax.com\/nimg\/43\/29\/8546772653cf97d5679765ba1dbb-200x200-1\/electrostatic_cnc_oil_mist_collector_with_motor_99_25_purify_efficiency_esp_extractor_for_industry_smoke_elimination.jpg","attrs":{"video outgoing-inspection":"Provided","machinery test report":"Provided","core components":"Motor","Place of Origin":"Hunan, China"}}
{"title":"ceiling mount ahu dx Fresh air air Handling Unit Cfm in hvac ahu Suppliers ahu","imgUrl":"https:\/\/img.chinax.com\/nimg\/41\/0c\/2b5bc5f9ae74c014f7509527a2d3-200x200-1\/ceiling_mount_ahu_dx_fresh_air_air_handling_unit_cfm_in_hvac_ahu_suppliers_ahu.jpg","attrs":{"Material":"Galvanized Steel","Feature":"Energy Saving, Easy Install, Flexible","Installation":"Ceiling Mounted","Shape":"Rectangle"}}
{"title":"High air Flow Fresh air Handling Unit FAHU for HVAC System","imgUrl":"https:\/\/img.chinax.com\/nimg\/8c\/30\/ac99d479789e7f6bdfc54aa1babb-200x200-1\/high_air_flow_fresh_air_handling_unit_fahu_for_hvac_system.jpg","attrs":{"Feature":"Flexible","Warranty":"1 Year","After-sale Service":"Online Technical Support, Free Spare Parts, Return and Replacement, Other","Project Solution Capability":"Others"}}
{"title":"HVAC System Ventilation Fixed Type Bathroom Exhaust Fan Return Air Filter Grille With Frame for External Wall","imgUrl":"https:\/\/img.chinax.com\/nimg\/a5\/87\/4e51374ffc2b912ef99c4e97dd8e-200x200-1\/hvac_system_ventilation_fixed_type_bathroom_exhaust_fan_return_air_filter_grille_with_frame_for_external_wall.jpg","attrs":{"Material":"Plastic, ABS","Feature":"Adjustable, Easy Installation","After-sale Service":"Online Technical Support","Project Solution Capability":"total solution for projects"}}
{"title":"Factory Direct Flexible Aluminum Foil Duct Hose Connector for HVAC Systems Ventilation Duct for Registers & Grilles","imgUrl":"https:\/\/img.chinax.com\/nimg\/6d\/fa\/9cd3ff7a45886f7eb97a24c3579b-200x200-1\/factory_direct_flexible_aluminum_foil_duct_hose_connector_for_hvac_systems_ventilation_duct_for_registers_26_grilles.jpg","attrs":{"Material":"Aluminum","Feature":"Easy Installation","Installation":"Ceiling","Shape":"Round"}}
{"title":"New Mobile DTF Smoke Fume Extractor Industrial Air Cleaning Equipment 350-550m\/h Capacity","imgUrl":"https:\/\/img.chinax.com\/nimg\/40\/ad\/66d19fab53686bd00b622af66ab2-200x200-1\/new_mobile_dtf_smoke_fume_extractor_industrial_air_cleaning_equipment_350_550m_2fh_capacity.jpg","attrs":{"Type":"fume extractor","Brand Name":"DINGHAN","Place of Origin":"Hunan, China","Application":"Industrial, Laboratory"}}
Hunan Dinghan Environmental Protection Technology Co., Ltd. is a recognized National High-Tech Enterprise specializing in the R&D, manufacturing, installation, and global service of premium HVAC ventilation and industrial air purification systems. Holding multiple invention patents and strategic R&D collaborations with top-tier institutions like Central South University, we continually drive innovation to deliver highly efficient, energy-saving clean air solutions worldwide.
Hardcore Manufacturing Capabilities Our modern 5,000+ square meter manufacturing facility is fully equipped with advanced CNC punching, laser cutting, and precision bending machinery, ensuring exceptional production efficiency and rigorous quality control. Today, our diverse product portfolio supports diverse commercial and industrial applications globally, featuring an annual capacity of: 10,000 Units of Air Heat Recovery & Fresh Air Systems (HRV/ERV) 6,000 Units of Purification Fresh Air Units & Air Handling Units (AHU) 5,000 Units of Industrial Fume Extractors & CNC Oil Mist Collectors 4,000 Units of VAV Boxes & HVAC Accessories
As global demand for cleaner workspaces grew, Dinghan transitioned from local engineering services to world-class manufacturing. By 2019, we established our own advanced factory, transforming years of field experience into high-performance equipment. From combating harsh winter climates with specialized Heat Recovery Ventilators to removing dangerous sub-micron particles with our Laser Fume Extractors and CNC Oil Mist Collectors, we built our product line based on real-world problems.
For Dinghan, clean air is not just a product we manufacture. It is a promise we keep for every worker, every workshop, and every single breath.
